Cradle type water retaining dam structure

The invention discloses a cradle type water retaining dam structure. The cradle type water retaining dam structure comprises a bottom plate structure, gate pier structures, an arched water retaining structure and power systems, wherein the gate pier structures are arranged on the side surfaces of the two sides of the bottom plate structure; the bottom plate structure comprises an upstream bottom plate straight section, a bottom plate groove section and a downstream bottom plate straight section; the arched water retaining structure comprises an arc-shaped water retaining body, supporting foot structures and hinge structures; the arched water retaining structure is connected with the gate pier structures through the hinge structures; power devices are connected with the upper end of the arc-shaped water retaining body through transmission structures; and the arched water retaining structure rotates around the hinge structures under the pull adjustment action of the power systems, and the working stages of wate